219971-70-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219971-70-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,7 and 1 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219971-70:
(8*2)+(7*1)+(6*9)+(5*9)+(4*7)+(3*1)+(2*7)+(1*0)=167
167 % 10 = 7
So 219971-70-7 is a valid CAS Registry Number.